If the tooth suddenly hurts, it is recommended to go to the hospital immediately, so that the doctor can identify the cause, including pulpitis, periapical inflammation, wisdom tooth pericoronitis, etc., for symptomatic treatment, because the treatment of different diseases is different, as follows: 1, pulpitis, periapical inflammation: If the toothache is caused by pulpitis, periapical inflammation, you should carry out endodontic treatment, remove the infected pulp and inflammatory material in the root canal, and then in the root canal The tooth will not hurt anymore and can be isolated from external stimuli to prevent reinfection. 2. Wisdom tooth pericoronitis: If the toothache is caused by wisdom tooth pericoronitis, local pericoronial rinsing should be carried out in the acute stage to remove the food residue embedded around the wisdom tooth, and the soft tissue around the wisdom tooth in the gingival sulcus and blind pocket. In the acute stage, you should perform local pericoronitis rinsing, remove food debris embedded around the wisdom tooth, apply medication inside the soft tissue around the wisdom tooth gingival sulcus and blind pocket, apply iodine glycerin to remove local irritation, and you can take oral amoxicillin and metronidazole for anti-inflammatory symptomatic treatment.